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35results about How to "Simple and mild preparation conditions" patented technology

Chitosan polyvinyl alcohol gel rubber containing nano granule of hydroxyapatite, producing method and uses of the same

The invention discloses a chitose / polyvinyl alcohol composite gel with hydroxyapatite nanometer particle and making method and application, which comprises the following parts: hydroxyapatite nanometer particle, chitose and polyvinyl alcohol, wherein the weight of chitose and polyvinyl alcohol is between 1: 20 and 8: 1 and the weight of hydroxyapatite nanometer particle and chitose is between 0. 5: 1 and 2: 1. The invention provides two making method of the composite gel, including directly adding method and original position generating method. The composite gel can be drug carrier to release sensitive drug slowly and injecting medical material to repair articular cartilage and organize engineering rack material, which can be applied in the cell culture.
Owner:华山科技股份有限公司

Portable arginine detection device and method

The invention belongs to the technical field of detection and relates to a portable arginine detection device and method. An AuNPs / CQDs fluorescent probe is fixed to filter paper, a paper-based nanometer fluorescent sensor is prepared, a laser in the length of 420 nm is adopted as an excitation wavelength standard in a dark room, and fluorescent signals on the paper-based sensor are directly readby an image collecting device; a fluorescence detection application in the image collecting device is adopted for converting chrominance components of fluorescent images into grayscale components on the basis of a grayscale model, then data processing is carried out, fitting of a grayscale-concentration fitting curve is achieved, and arginine is detected quickly, sensitively and conveniently. Therequirement for a demanded detection environment is low, and detection can be completed at the room temperature without other additional conditions. The portable arginine detection method is high in repeatability, does not require operation of correlated professional staff and can better meet the demands of the market and companies.
Owner:JIANGSU UNIV

Therapy diagnosis preparation based on polypyrrole compound and preparation method of preparation

The invention relates to a therapy diagnosis preparation based on a polypyrrole compound and a preparation method of the preparation. The prepared polypyrrole preparation possesses both ultrasound contrast diagnosis function and photo-thermal therapy function, successively combines real time, high efficiency, low cost, no radiation and other characteristics of ultrasound contrast diagnosis and high selectivity and high curative effect of near-infrared photo-thermal therapy , helps to substantially increase the diagnosis-therapy efficiency, and has extremely good clinical application potential.
Owner:PEKING UNIV

Preparation method of citral Pickering emulsion stabilized with modified corn starch

The invention provides a preparation method of citral Pickering emulsion stabilized with modified corn starch. The corn starch sold in the market is used as a raw material, and through esterificationand modification of octenyl succinic anhydride and freeze drying, the modified corn starch is obtained; and modified corn starch powder dissolves in a citric acid-sodium citrate acid buffer solution of which the pH is 3, under high-speed homogenizing, citral and medium-chain triglyceride are added, and the citral Pickering emulsion is prepared. The citral Pickering emulsion prepared by the preparation method disclosed by the invention is simple and mild in preparation condition, has the characteristics of being natural, environmentally-friendly and the like in raw materials, and good in stability, and the degradation of the citral under acid condition can be effectively relieved.
Owner:SHANGHAI INST OF TECH

Preparation and application of continuous cropping peanut resistant complex bacteria

The invention discloses preparation and application of continuous cropping peanut resistant complex bacteria. The complex bacteria comprise continuous cropping peanut resistant bio-control bacteria and an allelochemicals degrading bacteria agent. By using the complex bacteria, the degradation efficiency of the continuous cropping peanut allelochemicals is high, the disease of continuous cropping peanuts can be effectively inhibited, and the using amount of chemical pesticides and the accumulation of the continuous cropping peanut in the soil can be reduced; in addition, the complex bacteria are significant in environment pollution; because the degraded product can be used as a carbon source by the bacteria and is converted into a harmless substance, and the carbon source of the soil is increased, so that the absorption of the crop root system to degradable substances is facilitated, and the pollution to the environment is avoided; the complex bacteria is high in stability; gene mutation is avoided after continuous culturing, the inheritance can be stabilized, the quantity of beneficial bacteria in the soil can be increased, and the soil fertility is increased; moreover, the preparation method of the complex bacteria is simple and an extraction process of the complex bacteria is simple; in addition, toxic substances are not added in the preparation process, and the complex bacteria are easy to use; the quality and the yield of crops such as peanuts in China can be improved.
Owner:QINGDAO AGRI UNIV +1

High-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as preparation method and application thereof

The invention relates to a high-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as a preparation method and application thereof. The composite materialis composed of uniform nanosheets formed by mutually crosslinking nickel tetrasulfide and iron disulfide. The composite material contains high-valence metal ions Ni3+, so that the active sites of OERare increased, the coordination effect between ferronickel is enhanced, and the electro-catalytic performance is further improved. The composite material has the advantages of simple preparation process, high efficiency, mild synthesis conditions, environmental friendliness and the like, has higher catalytic activity and good electrochemical stability, is suitable for the field of electrochemistry, and has higher potential practical value.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Charge reversal-mediated injectable colloid grain drug gel slow-release implant and preparation method thereof

The invention discloses a charge reversal-mediated injectable colloid grain drug gel slow-release implant and a preparation method thereof. The implant contains the following components: polydopaminenanoparticles, gelatin nanoparticles, an acid former and a drug. The preparation method comprises the steps of respectively dispersing the polydopamine nanoparticles and the gelatin nanoparticles intoan alkaline solution, adding an anti-cancer drug before use, acidizing by virtue of the acid former, uniformly mixing until the mixture is acidized into gel, and carrying out intratumor injection. The implant prepared by virtue of the preparation method can be simultaneously taken as a photo-thermal treatment agent and a drug carrier, the nuclear magnetism imaging diagnosis can be realized through T2 weighting under relatively low laser intensity and relatively chemotherapy drug dosage, and the release of acid / thermal / enzyme responsive drug and the synergetic treatment of the photo-thermal treatment are realized, so that the integration of the diagnosis and treatment of cancers is realized.
Owner:HEFEI UNIV OF TECH

Preparation method of high-density metal azide with arbitrarily regulated filling density

The invention relates to a preparation method of a high-density metal azide with arbitrarily regulated filling density, and belongs to the field of initiating explosive devices. The preparation methodmixes hollow microspheres with different diameters constructed by nanoporous metal / metal oxide and fills a restraint shell with the hollow microspheres to prepare hollow microspheres constructed by the nanoporous metal / metal oxide with a little filling density in the restraint shell, and then places the restraint shell filled with the hollow microspheres constructed by the nanoporous metal / metaloxide in a reactor to be subjected to gas-solid in-situ chemical reaction with hydrazoic acid gas to prepare the metal azide with high filling density. The preparation method of the invention can prepare the high-density metal azide having a filling density of 50%-92% of theoretical density in the restraint shell. The prepared high-density metal azide (for example, the copper azide dose is more than or equal to 0.4 mg) in a single restraint shell can detonate HNS-IV, CL-20, PETN, RDX and other explosives with a filling density being 75%-92% of the theoretical density and a diameter being morethan or equal to 0.5 mm or ignite B / KNO3 and other ignition powder.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Antitumor slow-release implant having strong adhesion and hemostasis functions and preparation method thereof

The invention discloses an antitumor slow-release implant having strong adhesion and hemostasis functions and a preparation method thereof. Inspired by mussel adhesion mechanism and catechol and iron ion chelating mechanism, postoperative thermal chemotherapy hydrogel based on mussel adhesion mechanism deriving is developed successfully through bionic design and serves as a multifunctional operative tissue adhesion and treatment agent. Main ingredients of the implant include chitosan, gallic acid, Fe3+ chelating agent and drug. Coating and treating of a wound can be performed by covalently crosslinking and freeze-drying chitosan and gallic acid, dissolving before use, adding antitumor drug, utilizing the Fe3+ chelating agent for crosslinking and ultrasonically mixing well to form gel. The implant has various functions of adhesion, hemostasis, bacteria resisting, inflammation diminishing and thermal chemotherapy of the wound, and postoperative relapse prevention of tumor can be realized by coating an irregular wound of the tumor with the implant and performing mild thermal chemotherapy.
Owner:HEFEI UNIV OF TECH

Preparation method and application of manganese dioxide/polyoxyethylene composite solid electrolyte

The invention discloses a preparation method and application of a manganese dioxide / polyoxyethylene solid electrolyte, and the preparation method comprises the following steps: (1) adding acetonitrileinto a manganese dioxide nanosheet, performing ultrasonic cleaning to obtain manganese dioxide-acetonitrile dispersion liquid, adding polyoxyethylene PEO, and performing stirring to obtain a uniformemulsion; (2) adding lithium bis(trifluoromethanesulfonyl) imide LiTFSI into the emulsion, and performing stirring to obtain a uniform mixed solution; (3) pouring the mixed solution into a polytetrafluoroethylene mold, performing ventilating and evaporating of a drying box, cutting the prepared polymer solid electrolyte into wafers, and applying the wafers to a solid-state lithium metal battery. According to the invention, the transference number of lithium ions and the ionic conductivity of the polymer solid electrolyte are improved, the problems of drying and liquid leakage of an organic liquid battery are effectively avoided in the process of assembling the solid lithium metal battery, the encapsulation performance of the lithium metal battery is improved, and the good electrochemical cycling stability and safety are maintained.
Owner:XI AN JIAOTONG UNIV

Preparation method for flame retardant super-hydrophobic melamine sponge

ActiveCN108707248AAdjustable hydrophobicityRaw materials are readily availableSilica particleMicro nano
The invention discloses a preparation method for a flame retardant super-hydrophobic melamine sponge. The method comprises the steps that firstly silicon dioxide particles are put into a trismetyl aminomethane buffer solution with a pH value of 7.8, ultrasound treatment is carried out for 20-60 minutes, standing is carried out for 15 minutes at the indoor temperature, and then a gallotannic acid solution and a silver nitrate solution are added in sequence to obtain a mixed solution; a melamine sponge is immersed in the mixed solution, taken out after the mixed solution is stirred for 2 hours at the indoor temperature, and washed by deionized water and ethyl alcohol for several times to obtain a melamine sponge of which the surface has a micro-nano structure; finally, the melamine sponge isput into an ethyl alcohol solution which has volume concentration of 1:500-10000 and contains 1H, 1H, 2H, 2H-perfluorododecane mercaptan, stirring is carried out for 12 hours at the indoor temperature, the melamine sponge is taken out, washed by ethyl alcohol for several times and dried to obtain the super-hydrophobic melamine sponge of which water contact angle is larger than or equal to 145 degrees. The preparation method for the flame retardant super-hydrophobic melamine sponge has the advantages that the preparation process is simple and convenient, the conditions are mild, and the adjustment and control of hydrophobic performance of the super-hydrophobic melamine sponge can be achieved by changing the concentration of a 1H, 1H, 2H, 2H-perfluorododecane mercaptan solution during the preparation.
Owner:TIANJIN UNIV

Vaccine vector as well as preparation method and application thereof

The invention relates to the technical field of biological medicine, in particular to a vaccine vector and a preparation method and application thereof. The vaccine vector consists of oxidized mannan and a cationic polymer, the cationic polymer comprises at least one of polyethyleneimine, polyamide and poly beta urethane, or derivatives of the cationic polymer, or a block copolymer or graft copolymer of the cationic polymer and the derivatives thereof and polylactic acid or polylactic acid-glycolic acid. The vaccine vector disclosed by the invention is large in antigen loading capacity, simple and mild in vaccine preparation condition and good in stability, has excellent lymph node targeting and dendritic cell targeting capabilities, and can cause strong antigen-specific immune response.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI

Neutrophil extracellular sterilization network responsive drug-loaded gel and preparation method and application method thereof

ActiveCN114099417AExcellent anti-tumor metastasis effectGood biocompatibilityAerosol deliveryOintment deliveryDrug releaseBiocompatibility
The invention discloses a neutrophil extracellular sterilization network responsive drug-loaded hydrogel as well as a preparation method and a use method thereof. The drug-loaded hydrogel comprises electropositive histone and electronegative sodium alginate, the preparation method comprises the following steps: slowly dropwise adding a histone aqueous solution into a sodium alginate aqueous solution, and rapidly precipitating the solution; and collecting the white precipitate, shaping the white precipitate into a flaky polymer compound, and standing until the polymer compound becomes almost transparent, thereby obtaining the hydrogel. The used materials are high in biocompatibility, the preparation conditions are simple and mild, hydrogel material degradation is achieved through the tumor postoperative physiological process, NETs local drug release is achieved, and therefore the local high immunosuppression effect of NETs is corrected; meanwhile, the hydrogel drug delivery system has the tumor metastasis resisting curative effect superior to that of free drugs, the postoperative implantation mode is convenient and simple, and clinical application is facilitated.
Owner:CHINA PHARM UNIV +1

Preparation method of super-hydrophobic sponge for adsorbing organic solvent

The invention discloses a preparation method of super-hydrophobic sponge for adsorbing an organic solvent. The preparation method comprises the steps: placing silica particles into a trihydroxymethylaminomethane buffer solution with the pH value of 7.8, and carrying out ultrasonic treatment and standing; then, sequentially adding a tannic acid solution and a silver nitrate solution into the solution; soaking polyurethane sponge into the mixed solution, carrying out stirring at room temperature for 2 h, taking out the polyurethane sponge, cleaning the polyurethane sponge several times by usingdeionized water, and then, cleaning the polyurethane sponge several times by using ethanol to obtain polyurethane sponge of which the surface has a micronano structure; and placing the treated polyurethane sponge into an ethanol solution having the volume concentration of 1:1000 and containing 1H,1H,2H,2H-perfluorododecanethiol, carrying out stirring at room temperature for 12 h, taking out the polyurethane sponge, cleaning the polyurethane sponge several times by using ethanol, and drying the polyurethane sponge to finally obtain super-hydrophobic polyurethane sponge of which the water contact angle is larger than or equal to 150 DEG. The preparation method is simple and convenient in preparation process and mild in conditions, and the regulation of hydrophobic property of the super-hydrophobic sponge can be realized by changing the concentration of a silica solution in a preparation process.
Owner:TIANJIN UNIV

A kind of preparation method and application of titanium dioxide coated ferric oxide composite material

The invention relates to a preparation method and application of a titanium dioxide coated ferric oxide composite material. The method comprises the following steps: synthesizing ferric oxide microspheres by using a hydrothermal method, and then separately coating the ferric oxide microspheres with a layer of amorphous titanium dioxide by a kinetic controlled water bath method; after that, carrying out heat treatment in an air atmosphere so as to obtain the crystal type titanium dioxide coated ferric oxide composite lithium ion battery anode material having a core-shell structure. The titaniumdioxide coated ferric oxide composite anode material prepared by the method effectively combines the high specific capacity of ferric oxide and the excellent cycle stability of titanium dioxide, thereby showing a higher specific capacity and stable cycle performance, and being an ideal lithium ion battery anode material; the material can be widely applied to lithium ion power batteries which require high energy density, long service life and high stability. Furthermore, the method provided by the invention is simple, mild in the conditions and lower in cost; the material has easily controlledmorphology structure and is suitable for mass production, thus having a good application prospect.
Owner:JINGDEZHEN CERAMIC UNIV

Green fluorescent material and preparation method thereof

The invention relates to a green fluorescent material and a preparation method thereof. A chemical expression of the green fluorescent material is Zn1-xB2O4:xMn<2+>, wherein x is greater than 0 but issmaller than or equal to 0.3. The green fluorescent material has the advantages that bright green light can be given out under the irradiation of near ultraviolet to blue light; particularly the green fluorescent material has high absorption performance in a blue light region; the material can be effectively excited by a blue light chip; preparation raw materials are cheap and can be easily obtained; no pollution exists; the preparation method is simple and mild; the production cost is low, and the like. The preparation method is suitable for large-scale industrial production. On the basis ofthe various advantages above, large-scale industrial production of the green fluorescent material can be realized; the green fluorescent material can be widely applied to the aspects of illumination,display and the like.
Owner:LANZHOU UNIVERSITY

Preparation method of superhydrophobic sponge for absorbing organic solvent

The invention discloses a preparation method of super-hydrophobic sponge for adsorbing an organic solvent. The preparation method comprises the steps: placing silica particles into a trihydroxymethylaminomethane buffer solution with the pH value of 7.8, and carrying out ultrasonic treatment and standing; then, sequentially adding a tannic acid solution and a silver nitrate solution into the solution; soaking polyurethane sponge into the mixed solution, carrying out stirring at room temperature for 2 h, taking out the polyurethane sponge, cleaning the polyurethane sponge several times by usingdeionized water, and then, cleaning the polyurethane sponge several times by using ethanol to obtain polyurethane sponge of which the surface has a micronano structure; and placing the treated polyurethane sponge into an ethanol solution having the volume concentration of 1:1000 and containing 1H,1H,2H,2H-perfluorododecanethiol, carrying out stirring at room temperature for 12 h, taking out the polyurethane sponge, cleaning the polyurethane sponge several times by using ethanol, and drying the polyurethane sponge to finally obtain super-hydrophobic polyurethane sponge of which the water contact angle is larger than or equal to 150 DEG. The preparation method is simple and convenient in preparation process and mild in conditions, and the regulation of hydrophobic property of the super-hydrophobic sponge can be realized by changing the concentration of a silica solution in a preparation process.
Owner:TIANJIN UNIV

Preparation method and application of a micro-nano structure iron oxide/carbon composite material

The invention relates to a preparation method and application of a micro-nanostructured iron oxide / carbon composite material. The iron oxide / carbon composite material synthesized by adopting a hydrothermal method and subsequent heat treatment has a micro-nano porous core-shell structure, and the carbon shell layer can effectively enhance the electron transport of an iron oxide material and alleviates the volume expansion problem of the iron oxide material in a process of electrochemical cycle at the same time, so that a higher specific capacity and stable cycle performance can be finally obtained; the micro-nanostructured iron oxide / carbon composite material is an ideal lithium ion battery negative material, and can be widely applied to lithium ion power batteries requiring high energy density, long service life and high stability. Furthermore, the preparation method provided by the invention is simple, easy in control of conditions, low in cost, low in requirements for equipment, andconvenient for mass production, thus having a good application prospect.
Owner:JINGDEZHEN CERAMIC UNIV

Preparation and application of an anti-peanut continuous cropping compound bacterial agent

The invention discloses the preparation and application of an anti-peanut continuous cropping compound bacterial agent. The compound bacterial agent includes an anti-continuous peanut cropping bacterial agent and an allelochemical degradation bacterial agent. The compound bacterial agent of the present invention has high degradation efficiency for peanut continuous cropping allelochemical substances , can effectively inhibit continuous cropping peanut diseases, reduce the amount of chemical pesticides and their accumulation in the soil, which is extremely important for environmental pollution, and the degraded products can be converted into harmless substances by bacteria as carbon sources, increasing soil carbon sources, which is beneficial The absorption of degraded substances by crop roots will not pollute the environment; the compound bacterial agent has good stability, no gene mutation will occur after continuous cultivation, stable genetics, can increase the number of beneficial bacteria in the soil, improve soil fertility, and The preparation method of the composite bacterial agent of the invention is simple, the extraction process is simple, no toxic substances are added in the preparation process, and the use is simple. It is conducive to improving the quality and output of crops such as peanuts in our country.
Owner:QINGDAO AGRI UNIV +1

A kind of catalyst for the oxidation synthesis of benzaldehyde of benzyl alcohol and its preparation method and application

The invention relates to a catalyst for benzyl alcohol oxidation to synthesize benzaldehyde and its preparation method and application. Firstly, carbon source, manganese salt and acrylic acid are dissolved in deionized water, and hydrothermal reaction is carried out, and the solids generated after the reaction are passed through successively. Filtration, washing and drying to obtain the precursor of the manganese-carbon composite; adding the precursor of the manganese-carbon composite to potassium permanganate in a mass ratio of 1: (0.5-10) into deionized water, stirring and oxidizing at room temperature , and then filtered, washed and dried to obtain a catalyst for the oxidation of benzyl alcohol to benzaldehyde. In the present invention, a manganese-carbon composite precursor is synthesized in one step using manganese salt and carbon source as raw materials through a hydrothermal method with mild conditions, and then utilizes the strong oxidizing property of potassium permanganate to react at room temperature to obtain manganese dioxide / hydrothermal The carbon composite microsphere forms a catalyst for the oxidation of benzyl alcohol to synthesize benzaldehyde, and has simple operation, mild reaction conditions and low raw material cost.
Owner:SHAANXI UNIV OF SCI & TECH

A kind of preparation method of high-efficiency air adsorption material

The invention discloses a preparation method of a high-efficiency air absorbing material. The preparation method comprises the following steps: (1) after slurry is subjected to refining treatment, de-liquoring and concentrating, adding a sodium hydroxide solution in a concentrated solution, mixing and stirring, increasing the temperature to 80 DEG C, reacting for 1 hour and then neutralizing and concentrating to 25 percent by weight of fiber pulp; (2) adding a silver nitrate and lanthanum nitrate mixed solution for fully mixing and then defiberizing to obtain micro-filament plant fiber slurry;(3) stirring and mixing the fiber pulp and fermentation mother liquor, introducing acetobacter xylinum for aerated culture, adding the micro-filament plant fiber slurry for uniform stirring and performing static culture to obtain bacterial cellulose cross-linked colloidal liquid; (4) in the colloidal liquid, adding a filling agent for uniform stirring, then adding a NaOH solution and after treatment, filtering, cleaning and granulating. The high-efficiency air absorbing material prepared by the preparation method disclosed by the invention realizes super adsorption ability to PM2.5 and otherharmful particles, meanwhile has a sterilizing effect and is natural and environmentally friendly in raw material, and simple and mild in preparation conditions.
Owner:桐源(上海)网络技术有限公司

A preparation method of high-density copper azide with constrained shell

The invention relates to a preparation method of a high-density copper azide with a constrained shell, which belongs to the field of pyrotechnics. Store nanoporous copper or nanoporous copper oxide in a constrained shell, and prepare copper azide with high density through gas-solid in-situ chemical reaction with azide gas before use; avoid during operation Eliminates the dangers of traditional primary explosive production, transportation and post-pressurization. The prepared copper azide in the restrained shell has a high packing density, no danger in the filling process, safe transportation and storage, high detonation power, and a single-shot restrained shell. The dose of copper azide belongs to the sub-milligram level, and the preparation process is green and pollution-free. Adopting the method of the present invention can make packing density 1.4~3.2g / cm 3 High-density copper azide, the prepared high-density copper azide in the confined shell can detonate HNS-IV with a packing density of 75%-92% of the theoretical density and a diameter of ≥0.5mm when the dosage of the high-density copper azide in the confined shell is ≥0.4mg , CL‑20, PETN and RDX and other explosives and ignition of B / KNO 3 Wait for the gunpowder.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

A kind of preparation method of flame-retardant superhydrophobic melamine sponge

ActiveCN108707248BAdjustable hydrophobicityRaw materials are readily availableSuperhydrophobeAlcohol
The invention discloses a preparation method for a flame retardant super-hydrophobic melamine sponge. The method comprises the steps that firstly silicon dioxide particles are put into a trismetyl aminomethane buffer solution with a pH value of 7.8, ultrasound treatment is carried out for 20-60 minutes, standing is carried out for 15 minutes at the indoor temperature, and then a gallotannic acid solution and a silver nitrate solution are added in sequence to obtain a mixed solution; a melamine sponge is immersed in the mixed solution, taken out after the mixed solution is stirred for 2 hours at the indoor temperature, and washed by deionized water and ethyl alcohol for several times to obtain a melamine sponge of which the surface has a micro-nano structure; finally, the melamine sponge isput into an ethyl alcohol solution which has volume concentration of 1:500-10000 and contains 1H, 1H, 2H, 2H-perfluorododecane mercaptan, stirring is carried out for 12 hours at the indoor temperature, the melamine sponge is taken out, washed by ethyl alcohol for several times and dried to obtain the super-hydrophobic melamine sponge of which water contact angle is larger than or equal to 145 degrees. The preparation method for the flame retardant super-hydrophobic melamine sponge has the advantages that the preparation process is simple and convenient, the conditions are mild, and the adjustment and control of hydrophobic performance of the super-hydrophobic melamine sponge can be achieved by changing the concentration of a 1H, 1H, 2H, 2H-perfluorododecane mercaptan solution during the preparation.
Owner:TIANJIN UNIV

Preparation method of protamine modified PLGA coated icariin nanospheres

The invention belongs to the technical field of biological nanomaterials, and discloses a preparation method of protamine (PS) modified PLGA coated icariin (LCA) nanospheres. The protamine modified PLGA coated icariin nanospheres (LCA at PLGA at PS) are prepared from the following raw materials according to specified parts: a dichloromethane solution of PLGA used as an oil phase; an icariin ethanol solution used as a medicine solution; a PVA aqueous solution used as an external water phase; and a protamine aqueous solution cation modified solution. The icariin ethanol solution and the PLGA dichloromethane solution are mixed to serve as the oil phase for the first time, the PVA aqueous solution serves as the water phase to react to generate PLGA coated icariin nanospheres, finally the surfaces of the nanospheres are modified with protamine for promoting cell absorptionto obtain the protamine-modified PLGA-coated icariin nanospheres, and the prepared nanospheres are uniform in size, safe and non-toxic. The invention aims to provide the preparation method of the nanospheres for improving the biological activity of icariin.
Owner:ANHUI AGRICULTURAL UNIVERSITY
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